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Dynamically generating queue functions from Jedis' source code #18

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merged 26 commits into from
Sep 9, 2024

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@avelino avelino commented Aug 8, 2024

fixed: #13

Summary by CodeRabbit

  • New Features

    • Introduced a submodule for the Jedis library to enhance Redis database interactions.
    • Added a new section in the README for building the Jedis library from source.
    • Implemented an allowlist for Redis commands to improve command validation and security.
    • Added functions for managing message encoding and decoding in the messaging system.
  • Bug Fixes

    • Updated message queuing logic to optimize message handling and retrieval.
  • Documentation

    • Enhanced documentation with clearer instructions for building and using the Jedis library.
  • Tests

    • Added comprehensive unit tests for encoding/decoding functionalities and queue operations.
    • Refactored test cases to utilize updated methods and improve clarity.
  • Chores

    • Updated GitHub Actions workflow to include a step for cloning submodules before installation.

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coderabbitai bot commented Aug 8, 2024

Walkthrough

Walkthrough

The changes introduce a submodule for the Jedis library, enhance build automation with a Makefile, and improve dependency management in the Clojure project. New files for command validation and reflection-based method handling are added, along with updates to queue operations and their corresponding tests. Documentation is also improved to guide users in building from source and utilizing the new functionalities effectively.

Changes

Files Change Summary
.gitmodules, Makefile, deps.edn, README.md Introduced submodule for Jedis, added build automation target, and updated dependency management.
resources/command-allowlist.edn New file defining allowed Redis list commands for command validation.
src/com/moclojer/internal/reflection.clj Added functions for method reflection and dynamic invocation of Jedis methods.
src/com/moclojer/rq/adapters.clj, src/com/moclojer/rq/pubsub.clj, src/com/moclojer/rq/queue.clj Updated message handling logic, including encoding/decoding and queue operations.
test/com/moclojer/rq/adapters_test.clj, test/com/moclojer/rq/queue_test.clj Added unit tests for new functionality and updated existing tests for queue operations.
vendor/jedis New subproject commit for the Jedis library.
test/com/moclojer/test_helpers.clj Namespace changed from test-utils to test-helpers.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant Makefile
    participant Git
    participant Jedis

    User->>Makefile: make all
    Makefile->>Git: git submodule update --init vendor/jedis
    Git->>Jedis: Fetch Jedis library
    Makefile->>Jedis: make mvn-package-no-tests
    Jedis-->>Makefile: Build complete
    Makefile-->>User: Build process finished
Loading

Assessment against linked issues

Objective Addressed Explanation
Implement remaining queue wrapper functions (#13)
Use reflection to retrieve methods and transpose them to clj (#13)

🐇 "In the garden where changes bloom,
The code hops forth, dispelling gloom.
With submodules and tests, oh what a sight,
Building and wrapping, everything feels right!
From queues to commands, all in a dance,
Let's celebrate these changes, give them a chance!" 🐇


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I don't really like working with git submodules - it's a lot of work to maintain and onboard new contributors, but in this case there's not much to do

Given that I've expressed my annoyance I'll get to the point that matters lol

We need good test coverage to validate that what we need is working and to write great documentation so that people with less experience can contribute.

Given that we're going down this path of implementing all the features, it's worth thinking about a way of generating documentation dynamically as well.

:deps
{redis.clients/jedis {:mvn/version "5.1.2"}
{redis.clients/jedis {#_#_:mvn/version "5.1.2"
:local/root "vendor/jedis/target/jedis-5.2.0-SNAPSHOT.jar"}
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You don't need to use jar in deps, you can use clj src from jedis, so you don't need to compile (generate the jar) to generate the build because it will take it from source

[clojure.tools.logging :as log]
[com.moclojer.rq.utils :as utils]))

(defn push!
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@J0sueTM I like to use the standard names used by the library we are wrapping, but the idea is for clj-rq to be simple and inclusive.

Even if someone doesn't know the names of Redis functions but knows about queues, they should be able to use clj-rq. In other words, it's important to keep push! and pop! calling their respective functions from jedis. These names are explicit about what is expected in execution.

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@avelino Using macros puts a couple of limitations on ourselves. Of course what you're asking is feasible, but I don't think that parsing directions, and adding them into the function definition is within our time budget.
ourselves
It would involve changing the way we load the parameters from a given class, which could dismantle our macro. And for goods sake, writing that shivers my whole spine. But it's feasible nevertheless.

I'll scratch out a way to have the direction parsed when loading the parameters, as I'm currently implementing the static documentation, as layed out here.

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it may be that you are complicating more than necessary, how would I do it?

I would keep the same logic of (defn push! [...]), but changing the calls we make directly to jedis to the functions built with the macro.

does it make sense?

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@avelino not just about the directions, in some functions we have things like a position (alike before and after) and some extra opts to add. If we straight forward make it "static" on this way, it would be easier to test out, since the tests we need to write involves some data transformation to fit the Redis patterns. But how can we improve it to maintain as dynamic as possible, @J0sueTM ?

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find out we can call specific opts while on code like this:
image

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@avelino @Felipe-gsilva There are too many variables to keep updating dynamically. I still think that we can of course check the direction from l or r, and check the method parameters and parse them appropiately. It just will take a lot more time.

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@J0sueTM I don't know if I understood the last comment - I imagine it's about @Felipe-gsilva's comment

It's clear my proposal to keep push! and pop! as they were before and have them use the macro implementation, right?

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@avelino Yes. My comment was regarding Felipe's coment. This conversation all happened before our meeting, when I finally understood what you meant with

keep push! and pop! as they were before and have them use the macro implementation

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It's worth writing by sharing what we will do in a separate comment so it doesn't get lost here

#18 (comment)

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@avelino give a look at the current implementation. Does it match with what you had in mind?

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avelino commented Aug 19, 2024

upstream sync/merge (main)

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J0sueTM commented Aug 20, 2024

@avelino I'll resolve the current conflicts locally.

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avelino commented Aug 27, 2024

@J0sueTM request review?
there are many conflicts, isn't it better to resolve them before doing the review?

Screenshot 2024-08-27 at 11 51 05

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J0sueTM commented Aug 27, 2024

@avelino the review request has been up for a long time now. I'll remove them for now 😅

;; `lpush` for example encodes a given `value` through the `:edn-array`,
;; and decodes the result through the `:none` format (`identity`).

(def allowmap
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@avelino @Felipe-gsilva these are the docstrings I wrote in a hurry. Would you guys change anything? This string can be as long as needed of course.

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it's great to start, over time we will improve (if necessary)

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remembering myself to document things.

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Remembering myself again. Forgot to add the single comment last time 😅

:parameters (map unpack-parameter (.getParameters method))})

(defn underload-methods
[arities methods]
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Document functions.

They're not simple enough to be understood without explanation.

@J0sueTM J0sueTM self-requested a review September 4, 2024 19:52
@J0sueTM J0sueTM changed the title WIP: dynamic queue fns Dynamically generating queue functions from Jedis' source code Sep 4, 2024
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LGTM!

Reviewing my own PR because I had requested a change 👀

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@J0sueTM it's important to document the methods in the readme, even if it's just a simple description

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J0sueTM commented Sep 5, 2024

@avelino Thanks for remembering. I indeed didn't update our documentation with the new changes.

Technically nothing got deprecated, but it would be nice to explain in the README how we do that. I think our codemonkey would be a great fit for that 👀

@coderabbitai Rewrite our current README.md, by (1) updating the example section, and putting all the new functions in there. Make it a bit dense, explaining how the options are common between them, but also explain the intricacies of each function. The functions I'm talking are specifically the ones in src/com/moclojer/rq/queue.clj, where we define by hand wrappers around the already wrapped jedis functions generated by ->wrap-method. And (2) add a section in the beggining of the file explaining how we generate everything dynamically from the jedis source code. Write that implies that our library has a differential from other ones: being always up to date, and being more secure (in terms of following deprecation notices and design changes) down to the heart.

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coderabbitai bot commented Sep 5, 2024

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@J0sueTM, I've gathered the necessary information to rewrite the README.md file. Below is the updated content:


Building from Source

To build the project from source, you need to ensure that the Jedis library is correctly set up. This project dynamically generates queue functions by wrapping methods from the Jedis library using reflection. This approach ensures that the library is always up-to-date with the latest changes in Jedis, providing enhanced security and compatibility.

To build the project, run:

make jedis

This command will clone the Jedis submodule and build the necessary components.

Example Usage

The clj-rq library provides a set of queue functions that are dynamically generated by wrapping methods from the Jedis library. These functions are defined in src/com/moclojer/rq/queue.clj and include:

  • push!: Adds an element to the queue.
  • pop!: Removes and returns an element from the queue.
  • bpop!: Blocks until an element is available to pop from the queue.
  • index: Retrieves an element at a specific index in the queue.
  • range: Retrieves a range of elements from the queue.
  • set!: Sets the value of an element at a specific index in the queue.
  • len: Returns the length of the queue.
  • rem!: Removes elements from the queue.
  • insert!: Inserts an element into the queue at a specific position.
  • trim!: Trims the queue to a specified range.

Common Options

All these functions share common options, such as specifying the queue name and handling encoding/decoding of messages. The options are passed as arguments to the functions and allow for flexible configuration.

Intricacies of Each Function

  • push!: This function adds an element to the queue. It supports options for specifying the direction (left or right) and encoding the message before pushing it to the queue.
  • pop!: This function removes and returns an element from the queue. It supports options for specifying the direction (left or right) and decoding the message after popping it from the queue.
  • bpop!: This function blocks until an element is available to pop from the queue. It is useful in scenarios where you need to wait for new messages to arrive.
  • index: This function retrieves an element at a specific index in the queue. It supports options for decoding the retrieved message.
  • range: This function retrieves a range of elements from the queue. It supports options for decoding the retrieved messages.
  • set!: This function sets the value of an element at a specific index in the queue. It supports options for encoding the message before setting it.
  • len: This function returns the length of the queue. It is useful for monitoring the size of the queue.
  • rem!: This function removes elements from the queue based on a specified pattern. It supports options for specifying the number of elements to remove.
  • insert!: This function inserts an element into the queue at a specific position. It supports options for encoding the message before inserting it.
  • trim!: This function trims the queue to a specified range. It is useful for maintaining the size of the queue within certain limits.

Dynamic Generation of Functions

The clj-rq library leverages the ->wrap-method macro to dynamically generate queue functions by wrapping methods from the Jedis library. This approach ensures that the library is always up-to-date with the latest changes in Jedis, providing enhanced security and compatibility.

The ->wrap-method macro is defined in src/com/moclojer/internal/reflection.clj and is used in src/com/moclojer/rq/queue.clj to generate the queue functions. By using reflection, the library can dynamically adapt to changes in the Jedis API, ensuring that the generated functions are always in sync with the underlying Jedis methods.

This dynamic generation process is a key differentiator of the clj-rq library, making it more secure and future-proof compared to other libraries that rely on static function definitions.


Let me know if you need any further adjustments or additional details!

Analysis chain

Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Step 1: Extract all function definitions from src/com/moclojer/rq/queue.clj, including those generated by the ->wrap-method macro.
ast-grep --lang clojure --pattern $'(defn $_ $_)' --pattern $'(defmacro $_ $_)' --pattern $'(def $_ $_)' src/com/moclojer/rq/queue.clj

# Step 2: Analyze the dynamic generation process by searching for the ->wrap-method macro usage in the codebase.
rg --pcre2 --multiline --multiline-dotall --glob '*.clj' '->wrap-method'

Length of output: 728


Script:

#!/bin/bash
# Step 1: Search for function definitions in src/com/moclojer/rq/queue.clj.
rg --pcre2 --multiline --multiline-dotall --glob 'src/com/moclojer/rq/queue.clj' '\(defn\s+\w+'

# Step 2: Search for the ->wrap-method macro usage in the codebase.
rg --pcre2 --multiline --multiline-dotall --glob '*.clj' '->wrap-method'

Length of output: 992


Script:

#!/bin/bash
# Step 1: Search for the ->wrap-method macro usage in the codebase with the corrected pattern.
rg --pcre2 --multiline --multiline-dotall --glob '*.clj' '\-\>wrap-method'

Length of output: 350

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J0sueTM commented Sep 5, 2024

@coderabbitai Maybe it would be better to include real code examples aside the intricacies of each function

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coderabbitai bot commented Sep 5, 2024

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For best results, initiate chat on the files or code changes.

@J0sueTM, I've gathered the relevant code examples for the queue functions and updated the README accordingly. Below is the revised content with real code examples included:


Example Usage

The clj-rq library provides a set of queue functions that are dynamically generated by wrapping methods from the Jedis library. These functions are defined in src/com/moclojer/rq/queue.clj and include:

  • push!: Adds an element to the queue.
  • pop!: Removes and returns an element from the queue.
  • bpop!: Blocks until an element is available to pop from the queue.
  • index: Retrieves an element at a specific index in the queue.
  • range: Retrieves a range of elements from the queue.
  • set!: Sets the value of an element at a specific index in the queue.
  • len: Returns the length of the queue.
  • rem!: Removes elements from the queue.
  • insert!: Inserts an element into the queue at a specific position.
  • trim!: Trims the queue to a specified range.

Common Options

All these functions share common options, such as specifying the queue name and handling encoding/decoding of messages. The options are passed as arguments to the functions and allow for flexible configuration.

Intricacies of Each Function with Examples

  • push!: This function adds an element to the queue. It supports options for specifying the direction (left or right) and encoding the message before pushing it to the queue.

    (rq-queue/push! client "my-queue" "message" {:direction :left})
  • pop!: This function removes and returns an element from the queue. It supports options for specifying the direction (left or right) and decoding the message after popping it from the queue.

    (rq-queue/pop! client "my-queue" {:direction :right})
  • bpop!: This function blocks until an element is available to pop from the queue. It is useful in scenarios where you need to wait for new messages to arrive.

    (rq-queue/bpop! client "my-queue" {:timeout 5})
  • index: This function retrieves an element at a specific index in the queue. It supports options for decoding the retrieved message.

    (rq-queue/index client "my-queue" 0)
  • range: This function retrieves a range of elements from the queue. It supports options for decoding the retrieved messages.

    (rq-queue/range client "my-queue" 0 -1)
  • set!: This function sets the value of an element at a specific index in the queue. It supports options for encoding the message before setting it.

    (rq-queue/set! client "my-queue" 0 "new-message")
  • len: This function returns the length of the queue. It is useful for monitoring the size of the queue.

    (rq-queue/len client "my-queue")
  • rem!: This function removes elements from the queue based on a specified pattern. It supports options for specifying the number of elements to remove.

    (rq-queue/rem! client "my-queue" "message" {:count 2})
  • insert!: This function inserts an element into the queue at a specific position. It supports options for encoding the message before inserting it.

    (rq-queue/insert! client "my-queue" "pivot-message" "new-message" {:position :before})
  • trim!: This function trims the queue to a specified range. It is useful for maintaining the size of the queue within certain limits.

    (rq-queue/trim! client "my-queue" 0 10)

Let me know if you need any further adjustments or additional details!

Analysis chain
Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Search for usage examples of the queue functions in the codebase, particularly in test files.
rg --pcre2 --multiline --multiline-dotall --glob '*.clj' '\b(push!|pop!|bpop!|index|range|set!|len|rem!|insert!|trim!)\b'

Length of output: 1742

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J0sueTM commented Sep 5, 2024

@coderabbitai Add an explanation, intricacies and examples for the pubsub functions in the file src/com/moclojer/rq/pubsub.clj.

Besides that, the generated doc looks great. Thanks robot.

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coderabbitai bot commented Sep 5, 2024

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@J0sueTM, I've gathered the necessary information about the pubsub functions in src/com/moclojer/rq/pubsub.clj. Below is the updated documentation with explanations, intricacies, and real code examples for each function:


Pub/Sub Functions

The clj-rq library provides a set of pub/sub functions that facilitate message publishing and subscription in a Redis-backed system. These functions are defined in src/com/moclojer/rq/pubsub.clj and include:

  • publish!: Publishes a message to a specified channel.
  • group-handlers-by-channel: Groups message handlers by their associated channels.
  • create-listener: Creates a listener that processes messages from subscribed channels.
  • unarquive-channel!: Unarchives a channel, making it active again.
  • pack-workers-channels: Packs worker channels into a format suitable for processing.
  • subscribe!: Subscribes to one or more channels and processes incoming messages.

Intricacies of Each Function with Examples

  • publish!: This function publishes a message to a specified channel. It is used to send messages to subscribers listening on that channel.

    (rq-pubsub/publish! client "my-channel" "Hello, World!")
  • group-handlers-by-channel: This function groups message handlers by their associated channels. It is useful for organizing handlers when dealing with multiple channels.

    (rq-pubsub/group-handlers-by-channel workers)
  • create-listener: This function creates a listener that processes messages from subscribed channels. It takes a map of handlers and returns a listener function.

    (let [listener (rq-pubsub/create-listener handlers)]
      (listener "my-channel" "Hello, World!"))
  • unarquive-channel!: This function unarchives a channel, making it active again. It is useful for reactivating channels that were previously archived.

    (rq-pubsub/unarquive-channel! client "my-channel")
  • pack-workers-channels: This function packs worker channels into a format suitable for processing. It is typically used in conjunction with other pub/sub functions to manage worker channels.

    (rq-pubsub/pack-workers-channels workers)
  • subscribe!: This function subscribes to one or more channels and processes incoming messages using the provided handlers.

    (rq-pubsub/subscribe! client ["my-channel"] handlers)

Let me know if you need any further adjustments or additional details!

Analysis chain
Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Step 1: Extract all function definitions from src/com/moclojer/rq/pubsub.clj.
ast-grep --lang clojure --pattern $'(defn $_ $_)' src/com/moclojer/rq/pubsub.clj

# Step 2: Search for usage examples of the pubsub functions in the codebase, particularly in test files.
rg --pcre2 --multiline --multiline-dotall --glob '*.clj' '\b(publish!|group-handlers-by-channel|create-listener|unarquive-channel!|pack-workers-channels|subscribe!)\b'

Length of output: 804


Script:

#!/bin/bash
# Step 1: Search for the remaining function definitions in src/com/moclojer/rq/pubsub.clj.
rg --pcre2 --multiline --multiline-dotall --glob 'src/com/moclojer/rq/pubsub.clj' '\(defn\s+\w+'

Length of output: 421


Learnings added
Learnt from: J0sueTM
URL: https://github.com/moclojer/clj-rq/pull/18

Timestamp: 2024-09-05T10:25:28.996Z
Learning: The `src/com/moclojer/rq/pubsub.clj` file contains the following functions: `publish!`, `group-handlers-by-channel`, `create-listener`, `unarquive-channel!`, `pack-workers-channels`, and `subscribe!`.

Note: Learnings are effective only in the context of similar code segments. To apply general coding guidelines, please configure review instructions. You can manage existing learnings in the app.

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Actionable comments posted: 26

Outside diff range comments (1)
README.md (1)

Line range hint 167-200: Improve the Complete Example Section

The complete example provided is a good start, but it could be more informative and detailed:

  1. Add comments within the code to explain what each line does, especially for complex operations like setting up listeners or handling messages.
  2. Consider adding error handling examples to show how to gracefully manage potential issues during queue operations or message handling.

Enhancing this section with these details will provide a more practical and educational resource for users trying to implement similar functionality.

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Review profile: ASSERTIVE

Commits

Files that changed from the base of the PR and between 3e17915 and ed9e222.

Files selected for processing (9)
  • .github/workflows/tests.yml (1 hunks)
  • README.md (4 hunks)
  • src/com/moclojer/internal/reflection.clj (1 hunks)
  • src/com/moclojer/rq/adapters.clj (1 hunks)
  • src/com/moclojer/rq/pubsub.clj (6 hunks)
  • src/com/moclojer/rq/queue.clj (1 hunks)
  • test/com/moclojer/rq/adapters_test.clj (1 hunks)
  • test/com/moclojer/rq/pubsub_test.clj (2 hunks)
  • test/com/moclojer/rq/queue_test.clj (1 hunks)
Additional context used
Learnings (1)
src/com/moclojer/rq/queue.clj (1)
Learnt from: J0sueTM
PR: moclojer/clj-rq#6
File: src/com/moclojer/rq/queue.clj:10-13
Timestamp: 2024-07-05T20:37:20.365Z
Learning: In the `push!` function of `src/com/moclojer/rq/queue.clj`, options are passed directly as keyword arguments, not within a map.
LanguageTool
README.md

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Additional comments not posted (29)
.github/workflows/tests.yml (1)

32-34: Ensure submodule cloning is robust and efficient.

The addition of the "Clone Submodules" step using make jedis is a strategic placement to ensure all necessary components are available before proceeding with the installation of the Clojure CLI. This step is crucial for the build process, especially in a dynamic environment like CI/CD where dependencies must be managed carefully.

Suggestions:

  1. Error Handling: Ensure that the make jedis command includes robust error handling to prevent failures that could halt the CI process unexpectedly.
  2. Efficiency: Verify that the Makefile command make jedis is optimized for speed to minimize the impact on the overall CI runtime.
test/com/moclojer/rq/pubsub_test.clj (4)

6-6: Namespace Update: Correct Reference to Helpers

The update from utils to helpers in the namespace import is consistent with the changes throughout the test file. This change is necessary to align with the new location of the gen-message function.


11-11: Updated Function Call: Correct Usage of helpers/gen-message

The update to use helpers/gen-message for generating messages within the build-workers function is correctly implemented. This change ensures that the function continues to operate as intended with the updated namespace.


26-26: Updated Function Call in Test Case: Correct Usage of helpers/gen-message

The update to use helpers/gen-message in the test case for archiving/unarchiving is correctly implemented. This ensures that the test continues to validate the pub/sub functionality as expected.


36-36: Updated Function Call in Test Case: Correct Usage of helpers/gen-message

The update to use helpers/gen-message in the test case for unarchiving after subscribing is correctly implemented. This ensures that the test continues to validate the pub/sub functionality as expected.

test/com/moclojer/rq/queue_test.clj (13)

6-6: Approved: Import of new helper module.

The import of com.moclojer.test-helpers aligns with the PR's objective to enhance test flexibility and message generation quality.


11-12: Approved: Use of gen-message function.

Utilizing helpers/gen-message for message generation in tests is a good practice as it likely standardizes and simplifies the creation of test data.


14-18: Approved: Test case for simple queue operations.

This test verifies the basic functionality of pushing and popping multiple messages, ensuring that the queue maintains the correct order and count.


20-26: Approved: Test case for directional queue operations.

Testing both right-push and left-pop operations ensures that the queue handles directional commands correctly.


28-33: Approved: Test case for pattern-based queue operations.

The use of pattern options in queue operations is tested to ensure that the queue correctly handles pattern-specific logic.


35-38: Approved: Test case for blocking queue operations.

This test checks the blocking behavior of the queue, which is crucial for operations that depend on the queue's state.


40-43: Approved: Test case for index-based retrieval from the queue.

Testing the retrieval of messages by index ensures that the queue can accurately access messages at specific positions.


45-49: Approved: Test case for range retrieval from the queue.

This test ensures that the queue can handle range queries, which are important for operations that need to access multiple messages at once.


51-55: Approved: Test case for setting values in the queue.

Testing the set! operation ensures that the queue can correctly modify messages at specified indices.


57-60: Approved: Test case for removing elements from the queue.

This test verifies the rem! operation, ensuring that the queue can correctly remove specified messages.


62-65: Approved: Test case for inserting elements into the queue.

Testing the insert! operation ensures that the queue can correctly add messages at specified positions relative to existing messages.


67-75: Approved: Test case for trimming the queue.

This test verifies the trim! operation, ensuring that the queue can correctly limit the number of messages it holds.


80-97: Consider moving manual test examples to separate documentation.

While the added manual test examples are valuable for developers, they might clutter the test file. Consider moving these examples to:

  1. A separate "examples" or "usage" file in the project.
  2. The project's README or documentation.
  3. A developer guide or wiki page.

This would keep the test file focused on automated tests while still providing accessible examples for developers.

src/com/moclojer/rq/adapters.clj (1)

26-30: Code approved for pack-pattern function.

The pack-pattern function correctly concatenates the pattern string with the queue name, and the debug logging provides useful traceability for operations. This implementation is straightforward and adheres to the expected functionality.

src/com/moclojer/rq/queue.clj (2)

2-5: Review of namespace and imports.

The namespace declaration and imports are correctly structured. The exclusion of pop! and range from clojure.core is necessary to avoid naming conflicts with the functions defined later in this file. The imports from com.moclojer.internal.reflection and com.moclojer.rq.adapters are essential for the reflection-based dynamic function generation and adapter usage respectively.


74-102: Review of utility functions (index, range, set!, len, rem!, insert!, trim!).

These utility functions are well-implemented, making effective use of the dynamically generated functions from the allowmap. Each function is concise and leverages destructuring and optional parameters effectively.

Ensure that all these functions are covered by unit tests, especially since they interact with external systems (Redis) and are critical to the application's functionality.

Consider adding unit tests to cover these functions thoroughly, including edge cases and error scenarios.

src/com/moclojer/internal/reflection.clj (2)

7-10: Documentation is already suggested.

A previous review comment has already suggested adding documentation for the unpack-parameter function. This suggestion is still valid and should be implemented to improve code clarity.


12-15: Documentation is already suggested.

A previous review comment has already suggested adding documentation for the unpack-method function. This suggestion is still valid and should be implemented to enhance understanding of the function's purpose and usage.

src/com/moclojer/rq/pubsub.clj (6)

5-6: Refactor: Import adjustments.

The imports have been adjusted to include com.moclojer.rq.adapters and com.moclojer.rq.queue, which are likely used in the new implementations within this file. This change aligns with the modifications in the message handling logic.


45-47: Refactor: Listener creation logic.

The create-listener function's documentation has been updated to clarify its role in routing messages to the appropriate consumer. This change improves the readability and maintainability of the code by making the function's purpose more explicit.


90-92: Refactor: Consistent pattern packing in worker channels.

The pack-workers-channels function now consistently uses adapters/pack-pattern for packing the channel patterns. This change ensures consistency across the message handling logic and aligns with the changes made in the publish! function.


119-124: Update: Enhanced unarchiving logic during subscription.

The unarquive-channel! function is now called with a lambda that uses the onMessage method of the listener, which is a significant change in how messages are processed upon subscription. This approach ensures that messages are handled as soon as they are unarchived, potentially improving responsiveness and system performance.


127-140: Refactor: Robust subscription handling.

The subscription logic now includes error handling for connection issues and attempts to reconnect, which enhances the robustness of the system. The use of future for non-blocking operations is a good practice that can improve the scalability of the application. However, ensure that the error handling and reconnection logic are thoroughly tested, especially in scenarios where multiple reconnection attempts might occur.

Consider implementing exponential backoff for reconnection attempts to avoid potential issues with frequent reconnection attempts.


Line range hint 12-33: Update: Enhanced message publishing logic.

The publish! function now uses adapters/pack-pattern for packing the message channel pattern, which is a shift from the previous implementation. This change likely enhances flexibility or compatibility with other components. Additionally, the message is now archived as a vector if the minimum consumer count isn't met, which could allow for more complex message structures or batch processing in the future. It's crucial to ensure that all dependent systems are updated to handle this new message format.

Consider adding more detailed logging for the archiving process to enhance traceability and debugging.

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Actionable comments posted: 10

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Additional context used
Learnings (1)
README.md (1)
Learnt from: J0sueTM
PR: moclojer/clj-rq#0
File: :0-0
Timestamp: 2024-09-05T10:25:29.194Z
Learning: The `src/com/moclojer/rq/pubsub.clj` file contains the following functions: `publish!`, `group-handlers-by-channel`, `create-listener`, `unarquive-channel!`, `pack-workers-channels`, and `subscribe!`.
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README.md

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Context: ... Ensure you have Make installed on your system ### build steps 1. Clone the reposito...

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[uncategorized] ~59-~59: Loose punctuation mark.
Context: ...er/rq/queue.cljand include: -push!: Adds elements to the queue. - pop!`: R...

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[uncategorized] ~146-~146: Loose punctuation mark.
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Context: ... suitable for processing. - subscribe!: Subscribes to one or more channels and ...

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[style] ~164-~164: Using many exclamation marks might seem excessive (in this case: 11 exclamation marks for a text that’s 6283 characters long)
Context: ...l"] handlers) ``` - unarquive-channel!: This function unarchives a channel, ...

(EN_EXCESSIVE_EXCLAMATION)

Additional comments not posted (3)
README.md (3)

26-41: Enhance the "Building from Source" Section

The "Building from Source" section is well-structured and informative, but it could benefit from a few enhancements to improve clarity and completeness:

  1. Specify the exact version of Java JDK required, as "version X.X or higher" is too vague for users who may not be familiar with Java development.
  2. Provide a direct link to the repository URL in the clone command to avoid confusion and streamline the setup process.
  3. Explain the significance of the make jedis command in more detail, particularly how it integrates with the rest of the project setup.

Consider incorporating these suggestions to make the instructions more user-friendly and precise.

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43-49: Clarify the Use of the ->wrap-method Macro

The section explaining the ->wrap-method macro is crucial for understanding how the library dynamically generates queue functions. However, it could be improved with:

  1. A brief code snippet showing the macro in use, which would help users visualize how it wraps Jedis methods.
  2. More detailed explanation of how reflection is used within the macro to adapt to changes in the Jedis API.

Adding these elements would greatly enhance the understanding of this advanced feature and its benefits.


140-168: Detail Pub/Sub Functionality

The "Pub/Sub" section outlines the functions available but lacks depth in explanation and examples:

  1. Include more comprehensive examples that show the interaction between publishing and subscribing, possibly with a small scenario.
  2. Explain the role and usage of group-handlers-by-channel and unarquive-channel! functions, as their importance might not be immediately clear to new users.

Expanding this section will help users better understand how to effectively use the pub/sub features of the library.

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Context: ... active again. - pack-workers-channels: Packs worker channels into a format sui...

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Context: ... suitable for processing. - subscribe!: Subscribes to one or more channels and ...

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[style] ~161-~161: Using many exclamation marks might seem excessive (in this case: 10 exclamation marks for a text that’s 6160 characters long)
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[uncategorized] ~146-~146: Loose punctuation mark.
Context: ...scribed channels. - unarquive-channel!: Unarchives a channel, making it active ...

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[uncategorized] ~147-~147: Loose punctuation mark.
Context: ... active again. - pack-workers-channels: Packs worker channels into a format sui...

(UNLIKELY_OPENING_PUNCTUATION)


[uncategorized] ~148-~148: Loose punctuation mark.
Context: ... suitable for processing. - subscribe!: Subscribes to one or more channels and ...

(UNLIKELY_OPENING_PUNCTUATION)


[style] ~164-~164: Using many exclamation marks might seem excessive (in this case: 11 exclamation marks for a text that’s 6283 characters long)
Context: ...l"] handlers) ``` - unarquive-channel!: This function unarchives a channel, ...

(EN_EXCESSIVE_EXCLAMATION)

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src/com/moclojer/rq/adapters.clj (11)

10-14: Approved: Centralized pattern definitions.

The centralized patterns map is well-implemented and supports maintainability by avoiding duplication across functions that require pattern matching. This approach aligns with best practices for code reusability and clarity.


16-24: Approved: Robust pattern validation.

The pattern->str function correctly handles pattern validation by using a map lookup and providing detailed error information if the pattern is not found. This implementation enhances error handling and ensures that the function's behavior is predictable and debuggable.


26-30: Approved: Efficient pattern packing.

The pack-pattern function efficiently combines the pattern prefix with the queue name, using straightforward string operations. This function is simple yet effective for its intended use, demonstrating good coding practices.


31-41: Approved: Safe pattern unpacking with logging.

The unpack-pattern function includes a safety check to ensure the queue name starts with the expected pattern and logs a warning if it does not. This approach is appropriate for non-critical mismatches, allowing the operation to continue while ensuring visibility of the issue.


43-49: Approved: Well-structured encoding functions map.

The encoding-fns map is well-structured and provides a clear and efficient way to handle different encoding types. This setup facilitates easy maintenance and extension if new encoding types need to be added in the future.


51-57: Approved: Robust encoding function retrieval.

The keyword-enc->fn function effectively retrieves encoding functions based on keywords, with comprehensive error handling that includes detailed exception information. This method ensures that encoding errors are easily traceable and understandable.


59-70: Approved: Flexible and safe encoding handling.

The encode function supports both keyword and function types for encoding, providing flexibility in how messages are encoded. The error handling is robust, ensuring that only valid encodings are processed, which prevents runtime errors and enhances the function's reliability.


72-88: Approved: Decoding functions with helper encapsulation.

The decoding-fns map is defined within a let block that encapsulates helper functions, promoting code cleanliness and local scope management. This structure is beneficial for readability and maintaining clear boundaries between function responsibilities.


90-96: Approved: Comprehensive decoding function retrieval.

The keyword-dec->fn function retrieves decoding functions with thorough error handling, similar to its encoding counterpart. This consistency in handling both encoding and decoding enhances the module's usability and reliability.


98-109: Approved: Flexible and safe decoding handling.

The decode function, like encode, supports both keyword and function types for decoding, with stringent error checks. This design choice ensures that the function can handle various input types safely, making it a robust component of the system.


111-119: Approved: Clear and robust list position handling.

The ->list-position function provides a clear mapping from keywords to list positions, with detailed error handling that informs the user about valid options if an invalid position is specified. This function exemplifies good practice in API design by making the interface user-friendly and error-resistant.

@J0sueTM J0sueTM merged commit 206dd1e into main Sep 9, 2024
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@J0sueTM J0sueTM deleted the feat/dynamic-queue-fns branch September 9, 2024 16:31
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avelino commented Sep 9, 2024

@J0sueTM it's worth writing a blog post about this release of clj-rq in moclojer.com/blog, sharing the project's evolution

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J0sueTM commented Sep 9, 2024

of course @avelino moclojer/moclojer.com#11

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implement remaining queue wrapper functions
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